方式1. 使用k-v容器,k保存原数组中的元素,v保存原数组中元素出现的次数;不管次数多少次,都保存在新的数组一次。 // 新建数组vararr = ['c','a','z','a','x','a'];// 清除重复元素functionclear(array){// 1. 用key-value的容器保存元素出现的次数vartmpDict = [];// var tmpDict = {};fo...
function clearArray(a){ storeArray = a.slice(0); a.length = 0; } function undoClearArray(a){ a = storeArray; return a; } in undoClearAray() we are returning the variable which have new reference(in your clearArray(), Both the original and new array refer to the same object. ...
Clear 清空该数组。该数组的长度将为零。 Concat 合并两个或多个数组。 Join 将数组的内容合并到一个字符串中。 Pop 删除数组的最后一个元素并返回该数组。 Push 将/值/添加到该数组的末尾。 RemoveAt 从数组中删除/索引/处的元素。 Shift 删除数组的第一个元素并返回该数组。 Sort 对所有数组元素进行排序。
Learn how to quickly and efficiently clear an array using JavaScript. Explore easy-to-follow steps and code examples for smooth array management.
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How to map() on nested array in a clear way Ask Question Asked 2 years, 11 months ago Modified 2 years, 11 months ago Viewed 90 times 0 Newbie here. Please review the following piece of code and suggest how would you write it in a more clear way, because as a newbie, all my way...
Let’s say we want to clear the array in the following variablemyArray: var myArray = [ elem0, elem1, ... ]; First, you can replace the current value with an empty array. Second, you can set the array’s length to zero.
you want to empty an array instead of adding one. however, there are multiple ways of clearing an array which we are going to discuss in this tutorial to make it much easier for you. let's assume we have an array, and we want to clear it. the first method can be the following: ...
In this article Arguments Remarks Example See Also Removes all elements from anArrayinstance. This function is static and is invoked without creating an instance of the object. Array.clear(array); Arguments Term Definition array The array to clear. ...
Note that it is not in fact set to the valueundefined, rather the property is removed from the array, making itappearundefined. The Chrome dev tools make this distinction clear by printingemptywhen logging the array. > myArray[0]undefined ...